Mathematics – Probability
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20916105e&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #161.05; Bulletin of the American Astronomical Society,
Mathematics
Probability
1
Scientific paper
We use a wavelet algorithm and photometric redshift probability distributions for a 4.5 micron selected sample of objects using data from the 8 square degree Spitzer Infrared Array Camera (IRAC) shallow survey and the NOAO Deep Wide Field Survey in Bootes to search for galaxy clusters to redshift 2. We find 292 high reliability galaxy cluster and group candidates, 93 of which are at z > 1. To date 8 of the z > 1 candidates have been confirmed spectroscopically, at redshifts from 1.06 to 1.41. Color magnitude diagrams in I [3.6] vs. [3.6] are presented for these spectroscopically confirmed clusters. The mean I [3.6] color for cluster galaxies for cluster redshifts out to 1 is well matched by a passively evolving model in which stars are formed in a 0.1 Gyr burst starting at redshift zf = 3. Cluster galaxies brighter than L* are systematically redder. At z > 1, a wider range of formation histories is needed, but for most of the clusters, passive models with zf > 4 match the mean I [3.6] color for cluster galaxies brighter than L*.
Barmby Pauline
Brodwin Mark
Brown Jonathan M.
Dey Arjun
Eisenhardt Peter R.
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